/**
 * Copyright (c) www.bugull.com
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.ebocy.hammer.core.db.mongo.encoder;

import java.lang.reflect.Field;

import com.ebocy.hammer.core.db.IEntity;
import com.ebocy.hammer.core.db.annotations.Default;
import com.ebocy.hammer.core.db.annotations.Ref;
import com.ebocy.hammer.core.db.mongo.BuguMapper;
import com.ebocy.hammer.core.db.mongo.MongoDao;
import com.ebocy.hammer.core.db.mongo.cache.MongoDaoCache;
import com.ebocy.hammer.core.db.mongo.mapper.StringUtil;

/**
 *
 * @author Frank Wen(xbwen@hotmail.com)
 */
public class RefEncoder extends AbstractEncoder{

    private Ref ref;

    public RefEncoder(Object obj, Field field){
        super(obj, field);
        ref = field.getAnnotation(Ref.class);
    }

    @Override
    public String getFieldName(){
        String fieldName = field.getName();
        String name = ref.name();
        if(!name.equals(Default.NAME)){
            fieldName = name;
        }
        return fieldName;
    }

    @Override
    public Object encode(){
        IEntity entity = (IEntity)value;
        String idStr = entity.getId();
        if(ref.cascade().toUpperCase().indexOf(Default.CASCADE_CREATE)!=-1 && StringUtil.isEmpty(idStr)){
            Class<?> clazz = field.getType();
            MongoDao dao = MongoDaoCache.getInstance().get(clazz);
            dao.insert(entity);
        }
        if(ref.cascade().toUpperCase().indexOf(Default.CASCADE_UPDATE)!=-1 && !StringUtil.isEmpty(idStr)){
            Class<?> clazz = field.getType();
            MongoDao dao = MongoDaoCache.getInstance().get(clazz);
            dao.save(entity);
        }
        return BuguMapper.toDBRef(entity);
    }

}
